JP6661658B2 - Method and apparatus for multiplexing transmission control information - Google Patents

Description

  Certain aspects of the present disclosure relate generally to wireless communications, and more particularly, to methods and apparatus for multi-user communications in a wireless network.

  [0002] In many telecommunications systems, communication networks are used to exchange messages between a number of interacting spatially separated devices. Networks may be classified according to geographical area, which may be, for example, a metropolitan area, a local area, or a personal area. Each such network may be designated a wide area network (WAN), metropolitan area network (MAN), local area network (LAN), or personal area network (PAN). Networks may also include switching / routing techniques used to interconnect various network nodes and devices (eg, circuit-switched vs. packet-switched), types of physical media employed for transmission (eg, wired-to-wired). Wireless), and the set of communication protocols used (eg, Internet Protocol Suite, Synchronous Optical Networking, Ethernet, etc.).

  [0003] Wireless networks are often preferred when the network elements are mobile and thus have a need for dynamic connectivity, or when the network architecture is formed in an ad hoc rather than fixed topology. Wireless networks employ intangible physical media in an unguided propagation mode using electromagnetic waves in frequency bands such as radio, microwave, infrared, and light. Wireless networks advantageously allow for user mobility and rapid field deployment as compared to fixed wired networks.

  [0004] As the volume and complexity of information wirelessly communicated between multiple devices continues to increase, the overhead bandwidth required for physical layer control signals continues to increase at least linearly. The number of bits used to convey physical layer control information is a significant part of the required overhead. Thus, with limited communication resources, it may be necessary to reduce the number of bits required to convey this physical layer control information, especially when multiple types of traffic are sent concurrently from an access point to multiple terminals. desirable. For example, when the access point sends downlink communications to multiple terminals, it is desirable to minimize the number of bits needed to control the downlink for all transmissions. Therefore, there is a need for improved protocols for transmission from / to multiple terminals.

  [0005] Various implementations of the systems, methods, and devices within the scope of the appended claims each have several aspects, of which a single aspect alone is described herein. Is not necessarily responsible for the desired attributes. Without limiting the scope of the appended claims, some salient features are described herein.

  [0006] The details of one or more implementations of the subject matter described in this specification are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages will be apparent from the description, drawings, and claims. Note that the relative dimensions in the following figures may not be drawn to scale.

  [0007] One aspect disclosed is a method of transmitting a wireless frame over a wireless network. The method includes generating first transmission control information for a first device, generating second transmission control information for a second device, and transmitting a wireless frame. The transmitting includes transmitting at least a portion of the first transmission control information in a first frequency range, while simultaneously transmitting the second transmission control information via a second frequency range that does not overlap with the first frequency range. Transmitting at least a portion of the first transmission control information, transmitting first data to the first device according to the first transmission control information, and transmitting second data to the second device according to the second transmission control information. And including.

  [0008] In some aspects, the method is also provided with generating first transmission control information indicating a data transmission frequency range for the first device that is different than the first frequency range. Transmitting the first data to the first device within the data transmission frequency range.

  [0009] In some aspects, the method also includes generating a wireless frame to perform multi-user communication using orthogonal frequency division multiple access (OFDMA). In some aspects, the method also includes generating common transmission control information for the first device and the second device, wherein transmitting the wireless frame comprises transmitting the wireless frame to the first frequency. The method further includes simultaneously transmitting the common transmission control information in both the range and the second frequency range, and transmitting the first data and the second data according to the common transmission control information. In some aspects, the method also includes generating first transmission control information defining transmission parameters for the third wireless device. In some aspects, the method also includes transmitting a second wireless frame to the first device indicating that the first transmission control information is transmitted in a first frequency range. In some aspects, the method also includes generating first transmission control information during a HE-SIGB field of a preamble of the wireless frame, and generating a second transmission control information during a HE-SIGB field of the preamble of the wireless frame. Generating information, wherein transmitting includes first transmission control information in a first frequency range and second transmission control information in a second frequency range. Transmitting the HE-SIGB field.

  [0010] In some aspects, the first frequency range is 20Mhz wide and the second frequency range is 20Mhz wide. In some aspects, the method also includes generating a long training field using either a 2x tone plan or a 4x tone plan, wherein transmitting the wireless frame comprises: The method further comprises transmitting a long training field before the first transmission control information and before the second transmission control information.

  [0011] Another aspect disclosed is a method of receiving wireless data by a wireless device from a wireless network. The method includes receiving, by a wireless device, a wireless frame including a preamble and a data portion, wherein the preamble includes first transmission control information in a first frequency range and a second transmission in a second frequency range. Wherein the data portion encodes the first data in a third frequency range and the second data in a fourth frequency range, and wherein the wireless device has the first transmission control information. Decoding the first transmission control information to determine whether the first data is identified by the first transmission control information and identifying the first data in response to identifying the wireless device. Decoding.

  [0012] In some aspects, the method also includes decoding the second transmission control information in response to the first transmission control information not identifying the wireless device; Decoding the second data in response to identifying the wireless device. In some aspects, the method includes determining a frequency range to encode data destined for the wireless device in the data portion based on decoding the first transmission control information; Decoding the first data in response to the frequency range determining to encode data destined for the wireless device.

  [0013] In some aspects, the first transmission control information is received in a first frequency range, the second transmission control information is received in a second frequency range, and both are in the HE-SIGB field. Is encoded. In some aspects, the method also includes parsing the second transmission control information based on an identifier of the wireless device to identify transmission control information specific to the wireless device. In some aspects, the method also includes decoding the first transmission control information using a 4x tone plan.

  [0014] Another aspect disclosed is an apparatus for transmitting wireless frames in a wireless network. The apparatus includes an electronic hardware processor and an electronic hardware memory, wherein the electronic hardware memory is operably connected to the electronic hardware processor and, when executed, provides the electronic hardware processor with a first device. And generating instructions for generating first transmission control information for the second device, generating second transmission control information for the second device, and transmitting a wireless frame. Wherein the transmission transmits at least a portion of the first transmission control information in a first frequency range, while simultaneously transmitting the second transmission control information over a second frequency range that does not overlap with the first frequency range. Transmitting at least a portion of the first data simultaneously, transmitting first data to the first device according to the first transmission control information, And a transmitting second data to the second device in accordance with signal control information.

  [0015] In some aspects, the electronic hardware memory, when executed, indicates to the electronic hardware processor a first data transmission frequency range for the first device that is different than the first frequency range. And generating further transmission control information and transmitting the first data to the first device on the indicated data transmission frequency.

  [0016] In some aspects, the electronic hardware memory, when executed, causes the electronic hardware processor to generate wireless frames for performing multi-user communication using orthogonal frequency division multiple access (OFDMA). Store further instructions. In some aspects, the electronic hardware memory, when executed, causes the electronic hardware processor to further instructions to cause the electronic hardware processor to generate common transmission control information for the first device and the second device. Storing, wherein transmitting the wireless frame comprises simultaneously transmitting the common transmission control information in both the first frequency range and the second frequency range; and transmitting the first data and the second data in accordance with the common transmission control information. And transmitting the second data.

  [0017] In some aspects, the electronic hardware memory, when executed, causes the electronic hardware processor to generate first transmission control information to define transmission parameters for the third wireless device. Store further instructions.

  [0018] In some aspects, the electronic hardware memory, when executed, indicates to the electronic hardware processor that the first transmission control information is to be transmitted in the first frequency range. Is stored in the first device. In some aspects, the electronic hardware memory, when executed, causes the electronic hardware processor to generate first transmission control information during a HE-SIGB field of the preamble of the wireless frame; And generating further transmission instructions in the HE-SIGB field of the first transmission control information, wherein transmitting further comprises transmitting the first transmission control information during the first frequency range. And transmitting a HE-SIGB field including second transmission control information in a second frequency range. In some aspects, the first frequency range is 20 Mhz wide and the second frequency range is 20 Mhz wide.

  [0019] In some aspects, the electronic hardware memory stores additional instructions that, when executed, cause the electronic hardware processor to generate a long training field using either a 2x tone plan or a 4x tone plan. And, here, transmitting the wireless frame further comprises transmitting a long training field before the first transmission control information and before the second transmission control information in the wireless frame.

  [0020] Another aspect disclosed is an apparatus for receiving wireless data by a wireless device from a wireless network. The apparatus includes a receiver configured to receive a wireless frame including a preamble and a data portion, wherein the preamble includes first transmission control information in a first frequency range and a second transmission control information in a second frequency range. Wherein the data portion encodes the first data in a third frequency range and the second data in a fourth frequency range, and wherein the apparatus transmits the first transmission control information. Decoding the first transmission control information to determine whether the first transmission control information is identified by the first transmission control information and decoding the first data in response to identifying the device. And a processor configured to do so.

  [0021] In some aspects, the processor is operable to decode the second transmission control information in response to the first transmission control information not identifying the wireless device; And decoding the second data in response to identifying the device. In some aspects, the processor determines a frequency range to encode data destined for the wireless device in the data portion based on decoding the first transmission control information; The range is further configured to: decode the first data in response to determining to encode data destined for the wireless device.

  [0022] In some aspects, the first transmission control information is received in a first frequency range, the second transmission control information is received in a second frequency range, and both are in the HE-SIGB field. Is encoded. In some aspects, the processor is further configured to parse the second transmission control information based on an identifier of the wireless device to identify transmission control information specific to the wireless device. In some aspects, the processor is further configured to decode the first transmission control information using a 4x tone plan.

1 is a diagram illustrating an example of a wireless communication system in which aspects of the present disclosure may be employed. FIG. 2 illustrates various components that may be employed in a wireless device that may be employed within the wireless communication system of FIG. FIG. 4 illustrates channel allocation for available channels for an 802.11 system. FIG. 3 illustrates an example structure of a physical layer packet that may be used to enable backward compatible multiple access wireless communication. FIG. 3 illustrates an example structure of a physical layer packet that may be used to enable backward compatible multiple access wireless communication. FIG. 4 illustrates an example structure of a physical layer packet that may be used to enable backward compatible multiple access wireless communication. FIG. 6B illustrates an example implementation of a map field 950 that may be included in the HE-SIGB common field of FIG. 6A. FIG. 7 illustrates another example implementation of a packet 1000 transmitted over at least four frequency bands. 7 is an exemplary frame format used in one disclosed implementation. 7 is an exemplary frame format used in one disclosed implementation. 2 is a flowchart 1200 for an exemplary method of wireless communication that may be employed within the wireless communication system 120 of FIG. 2 is a flowchart for an exemplary method of wireless communication that may be employed within the wireless communication system 120 of FIG. 2 is a flowchart for an exemplary method of wireless communication that may be employed within the wireless communication system 120 of FIG. 2 is a flowchart for an exemplary method of wireless communication that may be employed within the wireless communication system 120 of FIG.

  [0037] Various aspects of the novel systems, devices, and methods are described more fully below with reference to the accompanying figures. However, the disclosed teachings may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein, the scope of the present disclosure is disclosed herein, whether implemented or combined with other aspects of the invention. Those skilled in the art will appreciate that they cover any aspect of the novel systems, devices, and methods. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. Furthermore, the scope of the present invention is not to be construed as being limited to other aspects, aspects, or other aspects of the invention described herein that may be implemented using other structures, functions, or structures and functions. Devices or methods. It is to be understood that any of the aspects disclosed herein can be implemented by one or more elements of a claim.

  [0038] Although particular aspects are described herein, many variations and permutations of these aspects fall within the scope of the disclosure. While some benefits and advantages of the preferred aspects are described, the scope of the disclosure is not limited to any particular benefit, use, or purpose. Rather, the aspects of this disclosure shall be broadly applicable to a variety of wireless technologies, system configurations, networks, and transmission protocols, some of which are by way of example and not limitation, the figures and the following description of preferred aspects. Shown in The detailed description and drawings are merely illustrative of the disclosure rather than limiting, the scope of the disclosure being defined by the appended claims and equivalents thereof.

  [0039] Wireless network technology may include various types of wireless local area networks (WLANs). WLANs can be used to interconnect neighboring devices with one another, employing widely used networking protocols. Various aspects described herein may be implemented using WiFi®, or more generally, any of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 families of wireless protocols. May be applied to any communication standard, such as a member of. For example, various aspects described herein can be used as part of an IEEE 802.11 protocol, such as an 802.11 protocol that supports OFDMA communication.

  [0040] It may be beneficial to allow multiple devices, such as stations (STAs), to communicate with an access point (AP) at the same time. For example, this may enable multiple STAs to receive a response from the AP in less time and to send and receive data from the AP with less delay. This may also allow the AP to communicate with a larger number of devices overall, and may make bandwidth usage more efficient. By using multiple access communication, the AP may be able to multiplex Orthogonal Frequency Division Multiplexing (OFDM) symbols, for example, four devices at a time over an 80 MHz bandwidth, where: Each device utilizes a 20 MHz bandwidth. Thus, multiple access may be beneficial in some aspects, as multiple access may allow an AP to more efficiently use the spectrum available to that AP.

  [0041] Multiple access protocols in OFDM systems, such as the 802.11 family, in some aspects by assigning different subcarriers (or tones) of symbols transmitted between the AP and the STA to different STAs. Can be implemented. In this way, the AP may communicate with multiple STAs using a single transmitted OFDM symbol, where different tones of the symbol are decoded and processed by different STAs, and thus, to multiple STAs. Enables simultaneous data transfer. These systems are sometimes referred to as OFDMA systems.

  [0042] Such tone allocation schemes are referred to herein as "high-efficiency" (HE) systems, where data packets transmitted in such a multiple-tone allocation system are highly efficient (HE). Sometimes called a packet. Various structures of such a packet, including the backward compatibility preamble field, are described in detail below.

  [0043] Various aspects of the novel systems, devices, and methods are described more fully below with reference to the accompanying figures. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein, the scope of the present disclosure is disclosed herein, whether implemented or combined with other aspects of the invention. Those skilled in the art will appreciate that they cover any aspect of the novel systems, devices, and methods. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. Furthermore, the scope of the present invention is not to be construed as being limited to other aspects, aspects, or other aspects of the invention described herein that may be implemented using other structures, functions, or structures and functions. Devices or methods. It is to be understood that any of the aspects disclosed herein can be implemented by one or more elements of a claim.

  [0044] Although particular aspects are described herein, many variations and permutations of these aspects fall within the scope of the disclosure. While some benefits and advantages of the preferred aspects are described, the scope of the disclosure is not limited to any particular benefit, use, or purpose. Rather, the aspects of this disclosure shall be broadly applicable to a variety of wireless technologies, system configurations, networks, and transmission protocols, some of which are by way of example and not limitation, the figures and the following description of preferred aspects. Shown in The detailed description and drawings are merely illustrative of the disclosure rather than limiting, the scope of the disclosure being defined by the appended claims and equivalents thereof.

  [0045] Popular wireless network technologies can include various types of wireless local area networks (WLANs). WLANs can be used to interconnect neighboring devices with one another, employing widely used networking protocols. The various aspects described herein may be applied to any communication standard, such as a wireless protocol.

  [0046] In some aspects, the wireless signal may be transmitted according to the 802.11 protocol. In some implementations, a WLAN includes various devices that are components that access a wireless network. For example, there may be two types of devices: an access point (AP) and a client (also called a station or STA). In general, an AP can serve as a hub or base station for a WLAN, and a STA serves as a user of a WLAN. For example, a STA may be a laptop computer, a personal digital assistant (PDA), a mobile phone, and so on. In one example, the STA connects to the AP via a WiFi compliant wireless link to gain general connectivity to the Internet or other wide area network. In some implementations, the STA may be used as an AP.

  [0047] Also, an access point (AP) may include, be implemented as, or be known as, any of the terms base station, wireless access point, access node or similar terminology. is there.

  [0048] Station "STA" may also be an access terminal ("AT"), subscriber station, subscriber unit, mobile station, remote station, remote terminal, user terminal, user agent, user device, user equipment, or any It may include other terms, be implemented as any of them, or be known as any of them. Accordingly, one or more aspects taught herein may include a telephone (eg, a cellular phone or smartphone), a computer (eg, a laptop), a portable communication device, a headset, a portable computing device (eg, an individual). Information devices), entertainment devices (eg, music or video devices, or satellite radio), gaming devices or systems, global positioning system devices, or other suitable devices configured for network communication over wireless media. Can be incorporated.

  [0049] The methods and apparatus disclosed herein provide for transmission and reception of wireless frames that implement multi-user communications. The disclosed frames encode device-specific transmission control information for multiple devices participating in multi-user communication. To improve the efficiency of wireless communication, in some aspects, transmission control information for one or more devices may be grouped and transmitted over a particular frequency bandwidth, while Transmission control information for one or more other devices may be grouped and transmitted simultaneously over different frequency bandwidths. By multiplexing the transmission control information in this way, better utilization of the wireless medium can be achieved.

  [0050] Other aspects may provide an improved method of locating transmission control information for a particular device within a wireless frame. For example, some of the disclosed methods and systems generate or receive wireless frames that include a map field. The map field provides an indicator of the location of transmission control information for each device participating in the multi-user communication. Decoding the map field allows each receiving device to locate its respective transmission control information within the frame, thus improving the efficiency of processing the received frame. Data for that particular device may then be received based on the located transmission control information.

  [0051] Another aspect provides an improved method of encoding and decoding transmission control information. For example, in some aspects, the first device-specific transmission control information is encoded based on the identifier of the first device. When the transmission control information is received, the other devices perform decoding based on their own identifier, which is different from the identifier of the first device, so that the transmission control information cannot be normally decoded. The first device may be able to successfully decode the transmission control information based on its identifier, which is the same identifier used to encode the information.

  FIG. 1 illustrates an example of a wireless communication system 100 in which aspects of the present disclosure may be employed. The wireless communication system 100 may operate according to wireless standards, for example, at least one of the 802.11ah, 802.11ac, 802.11n, 802.11g, and 802.11b standards. Wireless communication system 100 may operate in accordance with a high efficiency wireless standard, for example, the 802.11ax standard. The wireless communication system 100 can include an AP 104 that communicates with STAs 106A-106D (sometimes collectively referred to as STA (s) 106).

  [0053] Various processes and methods may be used for transmission in wireless communication system 100 between AP 104 and STAs 106A-106D. For example, signals may be transmitted and received between AP 104 and STAs 106A-106D according to OFDM / OFDMA techniques. If so, the wireless communication system 100 may be referred to as an OFDM / OFDMA system. Alternatively, signals may be transmitted and received between AP 104 and STAs 106A-106D according to code division multiple access (CDMA) techniques. If so, the wireless communication system 100 may be referred to as a CDMA system.

  [0054] The communication link that allows transmission from the AP 104 to one or more of the STAs 106A-106D may be referred to as a downlink 108, and may provide transmission from one or more of the STAs 106A-106D to the AP 104. The enabling communication link may be referred to as uplink 110. Alternatively, downlink 108 may be referred to as a forward link or forward channel, and uplink 110 may be referred to as a reverse link or reverse channel.

  [0055] The AP 104 may serve as a base station and provide wireless communication coverage at a basic service area (BSA) 102. The AP 104, along with the STAs 106A-106D associated with the AP 104 and using the AP 104 for communication, may be referred to as a basic service set (BSS). Note that wireless communication system 100 may not have a central AP 104, but rather may function as a peer-to-peer network between STAs 106A-106D. Accordingly, the functions of the AP 104 described herein may alternatively be performed by one or more of the STAs 106A-106D.

  [0056] In some aspects, the STAs 106 may be required to associate with the AP 104 to send communications to and / or receive communications from the AP 104. In one aspect, information for associating is included during the broadcast by AP 104. To receive such a broadcast, STA 106 may perform, for example, a broad coverage search over a coverage area. Also, the search may be performed by the STA 106 sweeping the coverage area, for example, in a lighthouse manner. After receiving the information to associate, the STA 106 may send a reference signal, such as an association probe or request, to the AP 104. In some aspects, the AP 104 may use backhaul services, for example, to communicate with a larger network such as the Internet or the Public Switched Telephone Network (PSTN).

  [0057] In one embodiment, the AP 104 includes an AP high efficiency wireless controller (HEW) 154. The AP HEW 154 may perform some or all of the operations described herein to enable communication between the AP 104 and the STAs 106A-106D using the 802.11 protocol. The function of the AP HEW 154 is described in more detail below with respect to FIGS.

  [0058] Alternatively or additionally, STAs 106A-106D may include STA HEW 156. The STA HEW 156 may perform some or all of the operations described herein to enable communication between the STAs 106A-106D and the AP 104 using the 802.11 protocol. The function of the STA HEW 156 is described in more detail below with respect to FIGS.

  FIG. 2 illustrates various components that may be utilized in a wireless device 202 that may be employed within the wireless communication system 100 of FIG. Wireless device 202 is one example of a device that may be configured to implement the various methods described herein. For example, the wireless device 202 can include the AP 104 or include one of the STAs 106A-106D.

  [0060] The wireless device 202 may include an electronic hardware processor 204 that controls the operation of the wireless device 202. Processor 204 is sometimes called a central processing unit (CPU) or a hardware processor. Electronic hardware memory 206, which can include both read-only memory (ROM) and random access memory (RAM), can store instructions and data and provide them to processor 204. Portions of the memory 206 may also include non-volatile random access memory (NVRAM). Processor 204 typically performs logical and arithmetic operations based on program instructions stored in memory 206. The instructions in memory 206 may be executable to implement the methods described herein.

  [0061] Processor 204 may include or be a component of a processing system implemented with one or more processors. The one or more processors are general-purpose microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components. , May be implemented using any combination of dedicated hardware finite state machines, or any other suitable entity capable of performing computations or other operations on information. Processor 204, or processor 204 and memory 206, generates a packet that includes a value in the packet type field and generates a plurality of packets based at least in part on the value in the packet type field, as can be described in more detail below. 1 may be utilized to allocate multiple bits of a packet to each of the following fields of the packet generator 124 of FIG.

  [0062] The processing system may also include non-transitory machine-readable media for storing software. Software should be broadly interpreted to mean any type of instruction, regardless of name, such as software, firmware, middleware, microcode, hardware description language, and the like. The instructions may include code (e.g., in source code form, binary code form, executable code form, or any other suitable form of code). The instructions, when executed by one or more processors, cause the processing system to perform the various functions described herein.

  [0063] The wireless device 202 can also include a housing 208, which can include a transmitter 210 and a receiver 212 to enable transmission and reception of data between the wireless device 202 and a remote location. . The transmitter 210 and the receiver 212 can be combined into a transceiver 214. Antenna 216 may be mounted on housing 208 and electrically coupled to transceiver 214. Wireless device 202 may also include, for example, multiple transmitters, multiple receivers, multiple transceivers, and / or multiple antennas that may be utilized during multiple-input multiple-output (MIMO) communications (shown). Zu).

  [0064] Wireless device 202 may also include a signal detector 218 that may be used to detect and quantify the level of the signal received by transceiver 214. Signal detector 218 may detect such signals as total energy, energy per subcarrier per symbol, power spectral density, and other signals. Wireless device 202 may also include a digital signal processor (DSP) 220 for use in processing signals. DSP 220 may be configured to generate data units for transmission. In some aspects, the data units may include physical layer protocol data units (PPDUs). In some aspects, the PPDU is called a packet.

  [0065] The wireless device 202 may further include a user interface 222 in some aspects. User interface 222 may include a keypad, microphone, speaker, and / or display. User interface 222 can include any element or component that communicates information to a user of wireless device 202 and / or receives input from the user.

  [0066] The various components of the wireless device 202 may be coupled together by a bus system 226. Bus system 226 may include, for example, a data bus, and may include, in addition to the data bus, a power bus, a control signal bus, and a status signal bus. One skilled in the art can appreciate that the components of the wireless device 202 can be coupled to each other or receive or provide input to each other using some other mechanism.

  [0067] Although several separate components are shown in FIG. 2, those skilled in the art will recognize that one or more of the components may be combined or commonly implemented. be able to. For example, processor 204 may be used not only to implement the functions described above with respect to processor 204, but also to implement the functions described above with respect to signal detector 218 and / or DSP 220. Further, each of the components shown in FIG. 2 may be implemented using multiple separate elements.

  [0068] As described above, the wireless device 202 may include the AP 104 or one of the STAs 106A-106D and may be used to transmit and / or receive communications. Communications exchanged between devices in a wireless network can include data units that can include packets or frames. In some aspects, a data unit may include a data frame, a control frame, and / or a management frame. Data frames may be used to transmit data from an AP and / or STA to other APs and / or STAs. Control frames may be used with data frames to perform various operations and to ensure data delivery (eg, acknowledging receipt of data, polling APs, area clearing operations, Channel acquisition, carrier detection maintenance function, etc.). The management frame may be used for various monitoring functions (eg, to join a wireless network, leave the network, etc.).

  [0069] FIG. 3 shows channel allocation for available channels for an 802.11 system. Various IEEE 802.11 systems support several different sized channels, such as 5 MHz, 10 MHz, 20 MHz, 40 MHz, 80 MHz, and 160 MHz channels. For example, an 802.11ac device can support reception and transmission of 20 MHz, 40 MHz, and 80 MHz channel bandwidths. A larger channel can include two adjacent, smaller channels. For example, an 80 MHz channel can include two adjacent 40 MHz channels. In currently implemented IEEE 802.11 systems, a 20 MHz channel includes 64 subcarriers separated from each other by 312.5 kHz. A smaller number of these subcarriers may be used to carry data. For example, a 20 MHz channel may include transmission subcarriers numbered -1 to -428 and 1 to 428, i.e., 56 subcarriers. Some of these carriers may also be used to transmit pilot signals.

  [0070] FIG. 4 shows an example structure of a physical layer packet that may be used to enable backward compatible multiple access wireless communication. This exemplary physical layer packet includes a legacy preamble 702 that includes a legacy short training field, a legacy long training field, and a legacy signal field. Packet 700 also includes an RL-SIG field 704 and a high efficiency signal A field 706. Packet 700 also includes data 712. Data 712 may include data transmitted using a multi-user transmission mode, such as by using MU-MIMO or OFDMA.

  [0071] Packet 700 also includes separate HE-SIGB fields 708a and 710a for each user participating in the multi-user communication performed in packet 700. In the aspect disclosed in FIG. 7, the information for each user of the multi-user transmission is separately encoded and includes individual error detection values, such as a cyclic redundancy check (CRC). For example, CRC 708b may correspond to HE-SIGB field 708a, and CRC field 710b may correspond to HE-SIGB field 710a. In some aspects, each of the HE-SIGB fields 708a and 710a is transmitted in a primary 20 Mhz channel.

  [0072] In some aspects of the packet 700, each user is allocated a fixed number of bits (code blocks) in the HE-SIGB field. Each code block may not necessarily be aligned with an OFDMA symbol boundary in that the code block may span two symbols in some aspects. In some aspects of the packet 700, the resource allocation for each STA participating in the multi-user communication may be independent of other STAs participating in the multi-user communication.

  [0073] Some aspects of utilizing packet 700 may use a different packet (not shown) than packet 700 to signal the location in packet 700 of the SIGB field for a particular STA. Some other aspects may indicate the location of the SIGB field for a particular STA with the data contained in the packet 700.

  [0074] Other aspects of utilizing packet 700 may encode, for each STA, the identifiers of the stations participating in the multi-user communication, along with the associated SIGB information. For example, in some aspects, an error detection value, such as a cyclic redundancy check, may be determined for at least a portion of the station SIGB information. The error detection value may be XOR'd with the identifier for the destination station and then included in packet 700, for example, as CRC 808b or 810b. In these aspects, the identifier and the error detection value may have an equal number of bits.

  [0075] When a packet is received by a station, the station may attempt to decode each HE-SIGB field 808a and 810a based on its identifier, but the encoding process is intended for other stations. Assuming that a different identifier is used for the HE-SIGB field, only the HE-SIGB field intended for that station will be correctly decoded. In some aspects, the identifier may be a station or a sub-station identifier.

  FIG. 5 shows an exemplary structure of a physical layer packet that may be used to enable backward compatible multiple access wireless communication. Packet 800 is similar in some respects to packet 700. Packet 800 includes a legacy preamble 802 that includes a legacy short training field, a legacy long training field, and a legacy signal field. Packet 800 also includes an RL-SIG field 804 and a high efficiency signal A field 806. Packet 800 also includes data 812. Data 812 may include data transmitted using a multi-user transmission mode, such as by using MU-MIMO or OFDMA.

  [0077] Similar to packet 700 of FIG. 4, packet 800 also includes a separate SIGB field for each user participating in the multi-user communication performed in packet 800. These SIGB fields are shown in FIG. 5 as HE-SIGB field 808a and HE-SIGB field 810a. In the aspect disclosed in FIG. 5, the information for each user of the multi-user transmission is separately encoded and includes an individual error detection value, such as a CRC. For example, CRC 808b may correspond to HE-SIGB field 808a, and CRC field 810b may correspond to HE-SIGB field 810a. In some aspects, each of the HE-SIGB fields 808a and 810a is transmitted in a primary 20 Mhz channel.

  [0078] Packet 800 also includes a map field 807 for a particular station to identify where its respective SIGB field is located in packet 800. Map field 807 may provide a mapping from identifiers of stations participating in multi-user communication to HE-SIGB locations in packet 800.

  [0079] FIG. 6A shows an exemplary structure of a physical layer packet that may be used to enable backward compatible multiple access wireless communication. FIG. 6A shows a portion of a packet 900 transmitted in four frequency bands 902a-d. In some aspects, frequency bands 902a-d may correspond to 0-20 Mhz, 20 Mhz-40 Mhz, 40 Mhz-60 Mhz, and 60 Mhz-80 Mhz, respectively. FIG. 6A shows that each frequency band 902a-d includes a duplicate transmission of legacy preamble 904, RL-SIG field 906, HE-SIGA field 908, and HE-SIGB common field 910. In some aspects, the HE-SIGB common field 910 is one of a downlink / uplink indicator, a single-user / multi-user indicator, a data GI and long training field (LTF) compression indicator, a padding bit, and a number of users indicator. One or more. In some aspects, the HE-SIGB common field 910 may be about 10-20 bits in length.

  [0080] Aspects utilizing packet 900 may also group transmission control information for one or more users into one of frequency bands 902a-902d. For example, in some aspects, transmission control information for up to nine unique users may be transmitted via HE-SIGB field 912 in each of frequency bands 902a-d. In some aspects, the device transmitting packet 900 may determine which of frequency bands 902a-d has relatively favorable interference characteristics for each STA participating in a multi-user communication performed as part of packet 900. Can be determined. Thus, SIG-B information for a particular STA may be scheduled within one of the frequency bands 902a-d having favorable characteristics.

  [0081] Each of the HE-SIGB common fields 910 in frequency bands 902a-d may include information specific to one or more users. The user-specific information includes, for example, an instruction of a modulation and coding scheme of data transmitted to the user as a part of the packet 900, a coding indicator, a space-time stream number indicator (Nsts), a space-time bock code (STBC). ) Indication, transmit beamforming (TxBF) indication, station / user identifier. In some aspects, the identification information may be a station / user partial identifier, group identifier, or other identifier. In some aspects, the station identification information may be less than 11 bits in length. Note that in some aspects, data transmitted to a particular user may be transmitted within the same frequency range as the particular user HE-SIGB field 912. However, in other aspects, data transmitted to a particular user may be transmitted in a different frequency range than the HE-SIGB field 912 for that particular user.

  [0082] In some aspects, each of the HE-SIGB fields 912 may include an error detection value, such as a CRC. In some aspects of encoding transmission control information for multiple users in at least some of the HE-SIGB fields 912, the transmission control information for multiple users is protected by the same error detection value. obtain.

  [0083] FIG. 6B illustrates an exemplary implementation of a map field 950 that may be included in the HE-SIGB common field 910 of FIG. 6A. Map field 950 may provide an indication of which users or stations have transmission control information in each of frequency bands 902a. (This transmission control information that is specific to each user / station is stored in the HE-SIGB field 912). As shown in FIG. 6B, the map field 950 is composed of a plurality of frequency indicator fields 952a-d. Each of the frequency indicator fields 952a-d may include a list of STA identifiers with transmission control information included in the HE-SIGB field 912 in each of the corresponding frequency bands 902a-d. By parsing the map field 950, the device receiving the packet 900 may determine which frequency band includes its user-specific transmission control information (in the HE-SIGB field 912).

  [0084] In some other aspects, the map field 950 may not be included in the HE-SIGB common field 910. In these aspects, separate signaling may be utilized to indicate to the receiving user / station which frequency bands 902a-d contain transmission control information specific to that user / station. For example, in some aspects, media access control (MAC) signaling may be used. In these aspects, each STA may decode only a subset of the total bandwidth utilized by packet 900.

  [0085] In some other aspects that do not include the map field 950, the receiving station / user may use each of the frequency bands 902a-d to determine transmission control information specific to the particular user / station. The HE-SIGB field 912 may be decoded.

  [0086] FIG. 7 shows another exemplary implementation of a packet 1000 transmitted over at least four frequency ranges 1010a-d. In some aspects, each of the frequency ranges 1010a-d may be 20 Mhz wide. Packet 1000 includes legacy preamble 1014, RL-SIG field 1016, HE-SIG-A field 1018, and HE-SIGB common field 1020, which are replicated over each of frequency ranges 1010a-d. As described above with respect to FIG. 6A, HE-SIGB common field 1020 may include information common to all station users participating in multi-user communications performed within packet 1000. In some aspects, the HE-SIGB common field 1020 includes one or more of a downlink / uplink indicator, a single-user / multi-user indication, a data GI and LTF compression indicator, padding bits, a number of users indicator. obtain. In some aspects, the HE-SIGB common field 1020 may be about 10-20 bits in length.

  [0087] Packet 1000 comprises a user / station in the device-specific portion of HE-SIGB field 1022, which comprises a station / user-specific transmission control information field 1052 for each station / user participating in the multi-user communication of packet 1000. The unique transmission control information is individually encoded. Each individual station / user specific transmission control information field 1052 may include information specific to one or more users. The user-specific information includes, for example, an indication of a modulation and coding scheme of data transmitted to the user as a part of the packet 1000, a coding indicator, a space-time stream number indicator (Nsts), a space-time Bock code (STBC) indication, a transmission beam. Forming (TxBF) indication, may include station / user identifier. In some aspects, the identification information may be a station / user partial identifier, group identifier, or other identifier. In some aspects, the station identification information may be less than 11 bits in length. Note that in some aspects, data transmitted to a particular user may be transmitted within the same frequency range as the station / user-specific transmission control information field 1052 for that particular user. However, in other aspects, data transmitted to a particular user may be transmitted in a different frequency range than the station / user-specific transmission control information field 1052 for that particular user.

  [0088] Each of the station / user-specific transmission control information fields 1052a-d may include its own error detection value, such as a CRC. The following description refers to the user-specific transmission control information fields 1052a-d, but the reader will note that the description applies to all of the station / user-specific transmission control information fields 1052 that fall within the frequency range 1010a-d. I want to be understood. However, instructions for the user-specific transmission control information in the frequency ranges 1010a to 1010c are omitted for clarity of the drawing.

  [0089] In some aspects, each of the error detection values for station / user-specific transmission control information fields 1052a-d may be based on a station identifier for a particular station. For example, in some aspects, an intermediate error detection value (eg, CRC) may be XOR'd with the station's identifier. In some aspects, the error detection value and the identifier have the same number of bits. In these aspects, the receiving station can only successfully decode the station / user-specific transmission control information fields 1052a-d for which it is intended.

  [0090] In some aspects, the receiving user / station may determine which of the frequency bands 1102a-d includes its user / station-specific transmission control information in a manner similar to that described above with respect to FIG. 6A. Can be determined. For example, map field 950 may be included in packet 1000 in some aspects. Alternatively, the receiving station may receive an indication of its frequency range 1010a-d including its transmission control information via separate MAC signaling. Alternatively, in some aspects, the receiving station may determine whether the receiving station can successfully decode one of the station / user specific transmission control information fields 1052 based on the station / user identifier. / User specific transmission control information field 1052 may be decoded.

  [0091] In some aspects, the device transmitting the packet 1000 may organize the location of the station / user-specific transmission control information field 1052 based on the user / station-specific interference characteristics of the frequency bands 1010a-d. For example, stations / users experiencing less interference on one of the frequency ranges 1010a-d may have their station / user-specific transmission control information field 1052 encoded on that frequency.

  [0092] As described above with respect to FIG. 6A, the user / station-specific data in data 1024 is transmitted on the same frequency range 1010a-d as the station / user-specific transmission control information field 1052 for that particular station. It may or may not be done. The station / user-specific transmission control information field 1052 for the particular station may indicate, in some aspects, the frequency used for data transmission for the particular station.

  [0093] Note that in some aspects, there may be an unequal number of STAs assigned to each of the frequency ranges 1010a-d. This may lead to different SIGB durations in each frequency range 1010a-d. In some aspects, physical layer panning may be added to data transmitted in one or more of the frequency ranges 1010a-d such that the duration of each frequency band is equal. In some aspects, HE-SIGB information for a particular STA may be repeated to perform padding.

  [0094] FIG. 8A is an exemplary frame format used in one disclosed implementation. Similar to packets 900 and 1000 in FIGS. 6A and 7, packet 1100 indicates data transmitted over four frequency bands 1102a-d. In some aspects, each frequency band 1102a-d may be 20 Mhz wide. For example, frequency band 1102a may be 0-20 Mhz, 1102b may be 20-40 Mhz, 1102c may be 40-60 Mhz, 1102d may be 60-80 Mhz.

  [0095] Packet 1100 includes a legacy preamble 1104 that includes legacy short and long training fields, and legacy signal fields. The packet 1100 includes an RL-SIG field 1106, a HE SIG-A field 1108, and an HE that includes information common to all users / devices participating in the multi-user communication performed within the packet 1100 as described above. And a SIGB common field 1110. As shown, each of the fields 1106, 1108, and 1110 is replicated over each of the frequency bands 1102a-d. In some aspects, the HE-SIGB common field 1110 includes one or more of a downlink / uplink indicator, a single-user / multi-user indication, a data GI and LTF compression indicator, a padding bit, a number of users indicator. obtain. In some aspects, the HE-SIGB common field 1110 may be about 10-20 bits in length.

  [0096] Similar to the HE-SIGB field 1012 of FIG. 7, the packet 1100 also includes an HE-SIGB field 1112. Each of HE-SIGB fields 1112 includes different transmission control information for different stations participating in the multi-user communication performed in packet 1100. Each of the HE-SIGB fields 1112 in frequency bands 1102a-d may include information specific to one or more users. The user-specific information includes, for example, an indication of a modulation and coding scheme of data transmitted to the user as part of the packet 1100, a coding indicator, a space-time stream number indicator (Nsts), a space-time Bock code (STBC) indication, a transmission beam. Forming (TxBF) indication, may include station / user identifier. In some aspects, the identification information may be a station / user partial identifier, group identifier, or other identifier. In some aspects, the station identification information may be less than 11 bits in length. Note that in some aspects, data transmitted to a particular user may be transmitted within the same frequency range as the particular user HE-SIGB field 1112. However, in other aspects, data transmitted to a particular user may be transmitted in a different frequency range than the HE-SIGB field 1112 for that particular user.

  [0097] The packet 1100 also includes an HE short training field 1114, an HE long training field 1116, and HE data 1118. In some aspects of packet 1100, HE-SIGB field 1112 may be transmitted using a 4x tone plan. For a 4x tone plan, each subband is 25% of the subband defined in 802.11ac. Thus, each symbol duration is four times (4x) longer than the 802.11ac symbol duration. This results in a four-fold (4x) increase in the number of tones in each symbol.

  [0098] The use of a 4x tone plan when transmitting the HE-SIGB4 field 1112 is utilized for the HE-SIGB field 1112, such that it is equal to the bandwidth utilized for the PPDU that encapsulates the packet 1100. Resulting in increased bandwidth.

  [0099] In implementations utilizing packet 1100, channel estimation by the receiver of packet 1100 may include interpolation / extrapolation from legacy long training fields in legacy preamble 1104.

  [00100] FIG. 8B is an exemplary frame format used in one disclosed implementation. 6A and 7, packets 1150 show data transmitted over four frequency bands 1152a-d. In some aspects, each frequency band 1152a-d may be 20 Mhz wide. For example, frequency band 1152a can be 0-20 Mhz, 1152b can be 20 Mhz-40 Mhz, 1102c can be 40 Mhz-60 Mhz, and 1152d can be 60 Mhz-80 Mhz.

  [00101] Packet 1150 includes a legacy preamble 1154, including legacy short and long training fields, and legacy signal fields. The packet 1150 includes an RL-SIG field 1156, a HE SIG-A field 1158, and an HE that includes information common to all users / devices participating in the multi-user communication performed within the packet 1150 as described above. And a SIGB common field 1165. As shown, each of the fields 1156, 1158, and 1165 is replicated over each of the frequency bands 1152a-d. In some aspects, the HE-SIGB common field 1165 includes one or more of a downlink / uplink indicator, a single-user / multi-user indication, a data GI and LTF compression indicator, padding bits, a number of users indicator. obtain. In some aspects, the HE-SIGB common field 1165 may be about 10-20 bits in length.

  [00102] Similar to the HE-SIGB field 1012 of FIG. 7 and 1112 of FIG. 8A, the packet 1150 also includes an HE-SIGB field 1162. Each of HE-SIGB fields 1162 includes different transmission control information for different stations participating in the multi-user communication performed in packet 1150. Each of the HE-SIGB fields 1162 in frequency bands 1152a-d may include information specific to one or more users. The user-specific information includes, for example, an indication of a modulation and coding scheme for data transmitted to the user as part of the packet 1150, a coding indicator, a space-time stream number indicator (Nsts), a space-time Bock code (STBC) indication, a transmission beam. Forming (TxBF) indication, may include station / user identifier. In some aspects, the identification information may be a station / user partial identifier, group identifier, or other identifier. In some aspects, the station identification information may be less than 11 bits in length. Note that in some aspects, data transmitted to a particular user may be transmitted within the same frequency range as the particular user HE-SIGB field 1162. However, in other aspects, data transmitted to a particular user may be transmitted in a different frequency range than the HE-SIGB field 1162 for that particular user.

  [00103] The packet 1150 also includes a SIGB long training field 1167, a HE-short training field 1164, a HE-long training field (HE-LTF) 1166, and HE data 1168. In some aspects of packet 1150, HE-SIGB field 1162 may be transmitted using a 4x tone plan. For the 4x tone plan, each subband is 20% of the subband defined in 802.11ac. Thus, each symbol duration is four times longer than the 802.11ac symbol duration. This results in an increase in the number of tones in each symbol.

  [00104] The use of a 4x tone plan when transmitting the HE-SIGB4 field 1112 is utilized for the HE-SIGB field 1112, such that it is equal to the bandwidth utilized for the PPDU that encapsulates the packet 1100. Resulting in increased bandwidth.

  [00105] In implementations that utilize packet 1150, channel estimation by the receiver of packet 1150 may rely on HE-LTF 1166. Since the HE long training field 1166 occurs in the packet 1150 before the HE-SIGB field 1162, they are used for channel estimation when those fields use a 4x tone plan and receive the field 1162. Can help. In some aspects, the HE-LTF field may utilize a 2x tone plan. In this case, if the HE-SIGB field 1162 utilizes a 4x tone plan, the receiver may interpolate / extrapolate to estimate the channel for the 4x tone plan. When the HE-LTF field 1166 utilizes a 4x tone plan, no additional interpolation / extrapolation may be required when using the obtained channel estimates to receive the HE-SIGB field 1162.

  [00106] FIG. 9 is a flowchart for an exemplary method of wireless communication that may be employed within the wireless communication system 100 of FIG. The method may be implemented in whole or in part by a device described herein, such as the wireless device 202 shown in FIG. The illustrated method is described herein with reference to the wireless communication system 100 described above with respect to FIG. 1 and the packets 900, 1000, 1100, 1150 described above with respect to FIGS. 6-8B. However, one of ordinary skill in the art will appreciate that the illustrated method may be implemented by another device described herein, or any other suitable device. Although the illustrated method is described herein with respect to a particular order, in various embodiments, the blocks herein may be implemented in a different order or omitted, and additional blocks may be added. Can be done.

  [00107] Method 1200 is a method of transmitting transmission control information to different devices participating in multi-user communication over different frequency bandwidths, for example, via MU-MIMO or OFDMA. By multiplexing the transmission control information in this way, the bandwidth of the wireless medium is generally reduced to existing techniques for replicating transmission control related data transmission over several bandwidths during multi-user communication. And can be used more efficiently.

  [00108] At block 1202, first multi-user transmission control information specific to the first device is generated. In some aspects, the first transmission control information may be transmission control information for multi-user communication using, for example, MU-MIMO or OFDMA. In some aspects, the first multi-user transmission control information includes an indication of a modulation and coding scheme, a coding indicator, a number of space-time streams of data transmitted to the user as part of a packet 900, 1000, 1100, or 1150. One or more transmission parameters, such as one or more of an indicator (Nsts), a space-time Bock Code (STBC) indication, a transmit beamforming (TxBF) indication, a station / user identifier, may be included. In some aspects, the identification information may be a station / user partial AID identifier, group identifier, or other identifier. In some aspects, the station identification information may be less than 11 bits in length. In some aspects, either the first multi-user transmission control information and / or the second multi-user transmission control information has a data communication over which each of the first and second devices is respectively. May indicate a data channel or data transmission frequency, which may be performed for

  [00109] In some aspects, generating transmission control information for the unique device includes generating an error detection value for the intermediate transmission control information. For example, the error detection value may include an indication of a modulation and coding scheme for data transmitted to the user as part of the packet 900, 1000, 1100, or 1150a, a coding indicator, a space-time stream number indicator (Nsts), a space-time Bock code. It may be generated based on transmission control information, such as one or more transmission parameters including one or more of (STBC) indication, transmit beamforming (TxBF) indication, station / user identifier. A second error detection value may then be generated based on the error detection value and the identifier for the unique device. In some aspects, the second error detection value is generated by XORing the identifier with the first error detection value. In some aspects, this may be enabled by having the identifier and the first error detection value have the same bit length. In some aspects, the first error detection value is a cyclic redundancy check value for the first multi-user transmission control information. The transmission control information then includes the second error detection value. By providing an error detection value based on the station identifier, this design provides that only the device with that identifier may be able to successfully decode the transmission control information. In some aspects, block 1202 may be performed by transmitter 210 and / or processor 204.

  [00110] In some aspects, the first multi-user transmission control information is generated to also include transmission control information specific to the third device. For example, in some aspects, the first multi-user transmission control information may include information for both a first device and a third device. The first multi-user transmission control information may then be protected via an error detection value, such as a cyclic redundancy check.

  [00111] At block 1204, second multi-user transmission control information specific to the second device is generated. In some aspects, the second multi-user transmission control information may include any of the data described for the first multi-user transmission control information above, except that the information is specific to the second device. It may include one or more. In some aspects, the first transmission control information may indicate a data transmission frequency for the first device that is different from the first frequency range. In some aspects, block 1204 may be performed by transmitter 210 and / or processor 204.

  [00112] In some aspects, the first multi-user transmission control information encodes transmission control parameters for a different number of users than the number encoded in the second multi-user transmission control information. Can be As a result, the first and second multi-user transmission control information may be of different lengths. In some aspects, the first multi-user transmission control information and the second multi-user transmission control information are of equal length and / or are transmitted because they are transmitted over different frequencies. Shorter fields may be padded so as to occupy an equal amount of time on the wireless network.

  [00113] At block 1206, transmission of a wireless frame begins. Transmitting the frame simultaneously transmitting at least a portion of the second multi-user transmission control information over the second frequency range while transmitting the first multi-user transmission control information over the first frequency range. May be included. For example, as described above with respect to FIGS. 6A-8B, HE-SIG fields 912, 1022, and 1112 may be transmitted over different frequency bandwidths. In some aspects, block 1206 may be performed by transmitter 210 and / or processor 204.

  [00114] At block 1208, transmit first (user) data to the first device according to the first multi-user transmission control information. For example, the first data may be transmitted to the first device via the frequency range indicated in the first transmission control information.

  [00115] At block 1210, transmit second (user) data to the second device according to the second multi-user transmission control information. For example, the second data may be transmitted to the second device via the frequency range indicated in the second transmission control information. In some aspects, the transmission control information is transmitted over a different frequency range than the data.

  [00116] For example, the first and second data may be part of a multi-user communication achieved by transmitted wireless frames. For example, the first and second data may be transmitted using MU-MIMO or OFDMA. The multi-user communication may be controlled by the first and second multi-user transmission control information and information contained in a wireless frame common to all stations / users participating in the multi-user communication. In some aspects, for example, as described above with respect to FIGS. 6A-8B, HE-SIGB common fields 910, 1020, and 1110 may include a downlink / uplink indicator, a single-user / multi-user indication, data It may include one or more of GI and LTF compression indicators, padding bits, user number indicators. As described above with respect to FIGS. 6A-8B, common transmission control information may be transmitted over both the first frequency range and the second frequency range. In other words, the common transmission control information may be transmitted redundantly over the two frequency ranges.

  [00117] In some aspects, the method 1200 also transmits a second wireless frame to the first device indicating that the first multi-user transmission control information is transmitted over a first frequency range. Including. In some of these aspects, a MAC is provided to indicate to one or more of the STAs participating in the multi-user communication as to where each STA-specific transmission control information is located in the wireless frame. Level signaling may be used. For example, the signaling may indicate one or more of a frequency range over which the station-specific transmission control information is transmitted and / or an offset within the wireless frame where the station-specific transmission control information is located. . In some aspects, blocks 1208 and / or 1210 may be performed by transmitter 210 and / or processor 204.

  [00118] In some aspects, the first and second multi-user transmission control information is transmitted using a 4x tone plan. As described above with respect to FIG. 8A, in some aspects, legacy short training fields and long training fields may be used for channel estimation. Reception of transmission control information by the receiving device may be based on these channel estimates. In some aspects, one or more long training fields may be generated using either a 2x tone plan or a 4x tone plan. The long training field (s) may be transmitted as part of the wireless frame prior to the first and second multi-user transmission control information in the wireless frame. This may be particularly useful when the first and second multi-user transmission control information is transmitted using a 4x tone plan. The long training field may be used by the receiver to perform channel estimation and may assist in correctly receiving transmission control information. In some aspects, the long training field is generated to not include beamforming information. In some aspects, the long training field is generated with a compression factor equal to the first and / or second data.

  [00119] In some aspects, method 1200 includes generating multi-user transmission control information that is common to both the first device and the second device. When a frame is transmitted, the common multi-user transmission control information may be transmitted redundantly over both the first frequency range and the second frequency range. Further, the first and second data are transmitted according to the common transmission control information.

  [00120] FIG. 10 is a flowchart for an exemplary method of wireless communication that may be employed within the wireless communication system 120 of FIG. The method may be implemented in whole or in part by a device described herein, such as the wireless device 202 shown in FIG. The method illustrated herein is described with reference to the wireless communication system 100 described above with respect to FIG. 1 and the packets 900, 1000, 1100, and 1150 described above with respect to FIGS. 6A-8B. However, those skilled in the art will appreciate that the illustrated method may be implemented by another device described herein, or any other suitable device. Although the illustrated method is described herein with respect to a particular order, in various embodiments, the blocks herein may be implemented in a different order or omitted, and additional blocks may be added. Can be done.

  [00121] Method 1300 enables a device that receives data during a multi-user communication to receive, via various frequencies, transmission control information that controls reception of data during the multi-user communication. By being able to receive transmission control information over various frequencies, multi-user communication transmitters have the flexibility to allocate transmission frequencies to devices that experience more optimal channel conditions on those frequencies. Acquire the ability. Furthermore, the overall utilization of the wireless medium is improved over known techniques, as transmission control information for different users can be transmitted simultaneously over different frequencies.

  [00122] At block 1304, a wireless frame including a preamble and a data portion is received. The preamble includes first transmission control information in a first frequency range and second transmission control information in a second frequency range. In some aspects, the first transmission control information may be first multi-user transmission control information and the second transmission control information may be second multi-user transmission control information. The data portion may encode first data on a third frequency range and second data on a fourth frequency range. In some aspects, the first frequency range may be equal to the third frequency range. In some aspects, the second frequency range may be equal to the fourth frequency range.

  [00123] For example, as shown above in any of FIGS. 6A, 7, 8A-8B, the various HE-SIGB fields 912, 1022 / 1052a-d, 1112, and 1162 are simply It may be transmitted over multiple frequency bands within one transmission. For example, first transmission control information for a first set of devices may be transmitted in a first frequency range and second transmission control information may be transmitted in a second frequency range. The two frequency ranges may not overlap. Each of the plurality of frequency bands may be 20 Mhz wide. For example, the plurality of frequency bands may include 0 to 20 Mhz, 20 Mhz to 40 Mhz, 40 Mhz to 60 Mhz, and 60 Mhz to 80 Mhz. In some aspects, block 1304 may be performed by receiver 212 and / or processor 204.

  [00124] At block 1306, the first transmission control information is decoded. Decoding may include parsing the wireless frame to identify relevant data portions of the frame that are used as input for further processing. In some aspects, the decoding is based on the identifier of the device. For example, in some aspects, the decoding may be based on the AID, PAID, or group ID of the receiving device. For example, an error detection value for the first multi-user transmission control information may be XOR'd with the device identifier. The obtained value may be used to verify the integrity of the first multi-user transmission control information. For example, the obtained value may be a cyclic redundancy check value for the first multi-user transmission control information.

  [00125] In some aspects, the first transmission control information is decoded using a 4x tone plan. In some aspects, a channel estimate may be determined based on one or more legacy short and / or long training fields included in a received wireless frame. The channel estimate may be interpolated / extrapolated to decode the first transmission control information in a 4x tone plan. In some other aspects, one or more long training fields may be decoded from a wireless frame. The long training field may be using either a 2X tone plan or a 4x tone plan. In embodiments that receive a long training field using a 2X tone plan, additional interpolation / extrapolation may be performed when forming the channel estimate. Channel estimation may be used to receive transmission control information. In embodiments that receive a long training field using a 4x tone plan, the resulting channel estimates may require less interpolation / outer when used to properly receive transmission control information using the 4x tone plan. Insertion may be required. In some aspects, block 1306 may be performed by processor 204.

  [00126] In some aspects, multi-user second multi-user transmission control information within the second frequency range is also decoded. For example, if the first transmission control information does not identify the receiving device, the receiving device decodes the second multi-user transmission control information to determine whether the receiving device is identified with the second transmission control information I can do it. The second multi-user transmission control information may identify a data transmission frequency range (s) for the identified device. In some aspects, decoding includes verifying that data in the second transmission control information complies with an error detection value, such as a CRC. In some aspects, the error detection value may be XOR'd with the identifier of the device, after which the obtained value is used to verify the consistency of the second multi-user transmission control information. In some aspects, the decoded transmission control information may then be parsed to identify a portion of the transmission control information that may be applied to a receiving device. For example, in some aspects, the received frame may include a map that defines a location in the received frame where transmission control information specific to the receiving device may be found. In some other aspects, information identifying the receiving device may be found prior to its unique transmission control information in the wireless frame.

  [00127] At block 1308, a data portion is decoded based on the decoded transmission control information. For example, the first and / or second transmission control information may include an indication of a frequency range to encode data transmitted to the user as part of a wireless frame, a modulation of data transmitted to the user as part of a wireless frame. And one or more of a coding scheme, a coding indicator, a space-time stream number indicator (Nsts), a space-time Bock Code (STBC) indication, a transmit beamforming (TxBF) indication, a station / user identifier. In some aspects, the identification information may be a station / user partial identifier, group identifier, or other identifier. In some aspects, block 1308 may be performed by processor 204.

  [00128] In some aspects, a wireless message is received indicating that the frequency range over which the transmission control information is transmitted to the device is the first frequency range. As described above with respect to at least FIGS. 6A and 7, a separate user / station is provided to indicate to the receiving user / station which frequency band of the received wireless frame contains transmission control information specific to the receiving user / station. Signaling may be utilized. For example, in some aspects, MAC signaling may be used. In these aspects, each STA may decode only a subset of the total bandwidth utilized by the received wireless frames.

  [00129] After the data portion is decoded at block 1308, it may be used to perform various functions of the device that receives the wireless frame. For example, in some aspects, the portion of the data being decoded in block 1308 may represent video data to be displayed on a screen of the device. By decoding the data portion at block 1308, display of the data on a screen may occur. In some aspects, the portion of the data decoded in block 1308 may represent audio data, such as the audio portion of a cellular call. By decoding the data portion at block 1308, audio may be played through the device speakers to allow a user on the call to listen to another party on the call. In some aspects, at least a portion of the data decoded at block 1308 may represent data received in response to web browsing activity by a user of the device. By decrypting the data portion at block 1308, the data may be prepared for processing by a web browser. The above description implies that block 1308 includes, for example, all of the steps required to display video data, play audio data, or prepare the data for a browser. is not. Instead, this is provided to give an example of how the decoding of the data in block 1308 allows the device to perform various functions. In general, decoding of the data in block 1308 is completed when the message destined for the receiving device is properly extracted from the received wireless frame and stored in the receiving device's general-purpose memory.

  [00130] FIG. 11 is a flowchart for an exemplary method of wireless communication that may be employed within the wireless communication system 120 of FIG. The method may be implemented in whole or in part by a device described herein, such as the wireless device 202 shown in FIG. The method illustrated herein is described with reference to the wireless communication system 100 described above with respect to FIG. 1 and the packets 900, 1000, 1100, and 1150 described above with respect to FIGS. 6A-8B. However, those skilled in the art will appreciate that the illustrated method may be implemented by another device described herein, or any other suitable device. Although the illustrated method is described herein with respect to a particular order, in various embodiments, the blocks herein may be implemented in a different order or omitted, and additional blocks may be added. Can be done.

  [00131] Method 1400 generates and transmits a wireless frame that includes location information for device-specific transmission control information included in the frame. For example, a multi-user communication may send data to multiple devices. Each of the plurality of devices may require device-specific transmission control information to support multi-user communication. The device-specific transmission control information for each device may be located at a specific offset within the wireless frame. The location information may provide a directory where transmission control information for a particular device is located within the frame. When the device receives such a frame, the device may decode the location information to determine where in the frame to go to find its device-specific transmission control information. By providing a position or index where the transmission control information for a particular device is located in the frame, the receiving device may include the transmission control information before identifying its specific transmission control information. Since it is not necessary to search all of the information, processing efficiency may be increased.

  [00132] In some aspects, the location information may take the form of a map, which may be a contiguous portion of a frame identifying particular receiving users / stations and the location of their respective transmission control information.

  [00133] In some aspects, location information may be included in multiple HE-SIGB fields included in a received frame. In some aspects, the location information may precede the transmission control information in the frame. For example, in some aspects, the identifier of the device may immediately precede the transmission control information for that device.

  [00134] At block 1402, generate first multi-user transmission control information for a first device. In some aspects, the transmission control information includes an indication of a modulation and coding scheme for data transmitted to the user as part of a wireless frame (described below), a coding indicator, a space-time stream number indicator (Nsts), It may include one or more of a space-time Bock Code (STBC) indication, a transmit beamforming (TxBF) indication, a station / user identifier. In some aspects, the identification information may be a station / user partial identifier, group identifier, or other identifier. In some aspects, the first multi-user transmission control information is generated / encoded in a first HE-SIGB field. In some aspects, the first multi-user transmission control information may be generated to include transmission control information for a third device. In some aspects, block 1402 may be performed by processor 204.

  [00135] At block 1404, generate second multi-user transmission control information for the second device. The second multi-user transmission control information may be configured similarly to the first multi-user transmission control information generated in block 1402. In some aspects, the second multi-user transmission control information is generated / included in a second HE-SIGB field. In some aspects, the second multi-user transmission control information may also include multi-user transmission control parameters for the fourth device.

  [00136] In some aspects, each of the first and second multi-user transmission control information may include an error detection value. In some aspects, the error detection value may be based on corresponding transmission control information. In some aspects, the error detection value may also be based on the identifier of the corresponding device. For example, an error detection value for the first multi-user transmission control information may be based on an identifier of the first device. The error detection value for the second multi-user transmission control information may be based on the identifier for the second device. For example, in some aspects, the identifier of the device may be XOR'd with a CRC for transmission control information to form an error detection value. In some aspects, the identifier and the error detection value may comprise an equal number of bits. In some aspects, block 1404 may be performed by processor 204.

  [00137] At block 1406, location information is generated that indicates a location of the transmission control information for the first device and a location of the transmission control information for the second device within the wireless frame. For example, in some aspects, as described above with respect to FIG. 5, the map field 807 is a station-specific for each station participating in a multi-user communication implemented by the wireless frame generated in block 1408 below. It may indicate an offset within a wireless frame (described below) that provides transmission control information. In some aspects, block 1406 may be performed by processor 204. In some other aspects, generating the location information may include generating a plurality of HE-SIGB fields for inclusion in a wireless frame. Each HE-SIGB field may include transmission control information for one or more devices. In some aspects, the station identifier is encoded with the associated transmission control information.

  [00138] At block 1408, a wireless frame is generated to include the location information and the first and second multi-user transmission control information. Wireless frames may be generated to perform multi-user communication to multiple destination devices using at least one of MU-MIMO and / or OFDMA. Data for each of the first device and the second device included during the multi-user communication is transmitted according to the information provided in the first and second multi-user transmission control information. obtain. In some aspects, block 1408 may be performed by processor 204.

  [00139] At block 1410, a wireless frame is transmitted. In some aspects, block 1410 may be performed by transmitter 210 and / or processor 204.

  [00140] FIG. 12 is a flowchart for an exemplary method of wireless communication that may be employed within the wireless communication system 120 of FIG. The method may be implemented in whole or in part by a device described herein, such as the wireless device 202 shown in FIG. The method illustrated herein is described with reference to the wireless communication system 100 described above with respect to FIG. 1 and the packets 900, 1000, 1100, and 1150 described above with respect to FIGS. 6A-8B. However, those skilled in the art will appreciate that the illustrated method may be implemented by another device described herein, or any other suitable device. Although the illustrated method is described herein with respect to a particular order, in various embodiments, the blocks herein may be implemented in a different order or omitted, and additional blocks may be added. Can be done.

  [00141] Method 1500 provides for decoding wireless frames that include map information. The map information indicates to the receiving device where transmission control information specific to the receiving device can be located in the frame. Once located, the receiving device can decode its own transmission control information to receive the data as part of a multi-user communication performed by the received frame. Performance may be improved because the receiving device does not need to search for a frame for its specific transmission control information.

  [00142] At block 1502, a wireless frame is received. A wireless frame includes multi-user transmission control information and corresponding transmitted data for a plurality of wireless devices.

  [00143] At block 1504, the wireless frame is decoded to identify a location in the wireless frame of multi-user transmission control information for the wireless device. In some aspects, the wireless frame includes map information indicating a location in the frame of transmission control information specific to the receiving device. For example, as described above with respect to the example of FIG. 5, map field 807 may indicate an offset within a received wireless frame that may be located for device-specific transmission control information. In some aspects, block 1502 may be performed by processor 204.

  [00144] In some other aspects, information identifying the receiving device may be found, for example, in one of a plurality of HE-SIGB fields in the transmission control information. For example, as shown in FIG. 4, the received frame may include multiple HE-SIGB fields, one of which may include information related to the device that was received. In some aspects, block 1504 may be performed by processor 204.

  [00145] In some aspects, the receiving device may parse through each of the plurality of HE-SIGB fields until it identifies an HE-SIGB field that includes transmission control information for the receiving device.

  [00146] In some aspects, a station identifier (such as a STA ID or PID) is encoded in the frame along with associated SIGB information for each STA.

  [00147] At block 1506, the transmission control information at the identified location is decoded. In some aspects, decoding comprises comparing an error detection value for the transmission control information with a value derived from the transmission control information, such as a cyclic redundancy check.

  [00148] In some aspects, the transmission control information is decoded based on an identifier of the receiving device. For example, the error detection value may be XOR'ed with the receiving device's identifier to generate a second error detection value, which may be a CRC for the remainder of the transmission control information. In some aspects, block 1506 may be performed by processor 204.

  [00149] At block 1508, data addressed to the receiving device is received based on the decoded transmission control information. For example, the decoded transmission control information may include a modulation and coding scheme for data transmitted to the receiving device as part of a wireless frame, a coding indicator, a space-time stream number indicator (Nsts), a space-time Bock Code (STBC) indication, One or more of transmit beamforming (TxBF) indication and / or station / user identifier may be indicated. In some aspects, the identification information may be a station / user partial identifier, group identifier, or other identifier. In some aspects, block 1508 may be performed by receiver 212 and / or processor 204.

  [00150] Those of skill in the art would understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the above description may include voltages, currents, electromagnetic waves, magnetic or magnetic particles, light or optical particles, or any of them. It can be represented by a combination.

  [00151] Various modifications to the implementations described in this disclosure may be readily apparent to those skilled in the art, and the general principles defined herein may be made without departing from the spirit or scope of the present disclosure. It can be applied to other implementations. Accordingly, the disclosure is not limited to the implementations shown herein, but is to be accorded the widest scope consistent with the claims, principles, and novel features disclosed herein. Should. The word "exemplary" is used exclusively herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

  [00152] Also, some features described herein with respect to separate implementations may be implemented in combination in a single implementation. Also, conversely, various features that are described in the context of a single implementation can be implemented separately in multiple implementations or in any suitable subcombination. Moreover, although features are described above as working in some combinations, and may even be so initially claimed, one or more features from the claimed combination may in some cases May be deleted from the combination, and the claimed combination may be directed to sub-combinations or variations of sub-combinations.

  [00153] The various operations of the above-described methods may be performed by various hardware and / or software components (one or more), circuits, and / or their components, such as modules (s). The operations may be performed by any suitable means capable of performing the operations. Generally, any operations shown in the figures may be performed by corresponding functional means capable of performing the operations.

  [00154] The various exemplary logic blocks, modules, and circuits described in connection with the present disclosure may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), FPGAs or other programmable logic. It may be implemented or implemented using devices (PLDs), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors associated with a DSP core, or any other such configuration. obtain.

  [00155] In one or more aspects, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on, or transmitted via, the computer-readable medium as one or more instructions or code. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer readable media may be RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage device, or in the form of instructions or data structures. And any other medium that can be used to carry or store the desired program code of the computer and that can be accessed by the computer. Also, any connection is properly termed a computer-readable medium. For example, if software is used from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology such as infrared, radio, and microwave When transmitted, coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. As used herein, a disk and a disc are a compact disc (disc) (CD), a laser disc (disc), an optical disc (disc), a digital versatile disc (disc) ( DVD), floppy disks, and Blu-ray disks, where the disks typically reproduce data magnetically and the disks The data is reproduced optically with a laser. Thus, in some aspects, computer readable media may include non-transitory computer readable media (eg, tangible media). Further, in some aspects, computer readable media may include transitory computer readable media (eg, signals). Combinations of the above may also be included within the scope of computer-readable media.

  [00156] The methods disclosed herein include one or more steps or actions for achieving the described method. The method steps and / or actions may be interchanged with one another without departing from the scope of the claims. In other words, unless a particular order of steps or actions is specified, the order and / or use of particular steps and / or actions may be changed without departing from the scope of the claims.

  [00157] Additionally, modules and / or other suitable means for implementing the methods and techniques described herein may be downloaded by the user terminal and / or base station where applicable, and / or It can be appreciated that it can be obtained in other ways. For example, such a device may be coupled to a server to allow for the transfer of means for performing the methods described herein. Alternatively, the various methods described herein allow a user terminal and / or a base station to store storage means (eg, RAM, ROM, physical storage media such as a compact disk (CD) or floppy disk, etc.) Can be provided by storage means, so that various methods can be obtained when coupled to or provided. Moreover, any other suitable technique for providing the methods and techniques described herein to a device can be utilized.

[00158] While the above is directed to aspects of the present disclosure, other and further aspects of the present disclosure may be devised without departing from the basic scope thereof, the scope of which is set forth in the following claims. Is determined by
Hereinafter, the invention described in the claims at the time of filing the application of the present application is additionally described.
[C1] A method for transmitting a wireless frame via a wireless network, comprising:
Generating first transmission control information for a first device;
Generating second transmission control information for a second device;
Transmitting the wireless frame;
Wherein said transmitting comprises:
Transmitting at least a portion of the first transmission control information in a first frequency range and at least a portion of the second transmission control information via a second frequency range that does not overlap with the first frequency range , And
Transmitting first data to the first device according to the first transmission control information;
Transmitting second data to the second device according to the second transmission control information;
A method comprising:
[C2] generating the first transmission control information to indicate a data transmission frequency range for the first device that is different from the first frequency range;
Transmitting the first data to the first device within the indicated data transmission frequency range;
The method of C1, further comprising:
[C3] The method of C1, further comprising generating the wireless frame to perform multi-user communication using orthogonal frequency division multiple access (OFDMA).
[C4] further comprising generating common transmission control information for the first device and the second device, wherein transmitting the wireless frame includes:
Simultaneously transmitting the common transmission control information in both the first frequency range and the second frequency range;
Transmitting the first data and the second data according to the common transmission control information;
The method of C1, further comprising:
[C5] The method of C1, further comprising generating the first transmission control information to define transmission parameters for a third wireless device.
[C6] The method of C1, further comprising transmitting a second wireless frame to the first device indicating that the first transmission control information is transmitted in the first frequency range.
[C7] generating the first transmission control information in an HE-SIGB field of a preamble of the wireless frame;
Generating the second transmission control information during the HE-SIGB field of the preamble of the wireless frame;
Wherein the transmitting includes the first transmission control information in the first frequency range and the second transmission control information in the second frequency range. Comprising transmitting an HE-SIGB field;
The method according to C1.
[C8] The method according to C7, wherein the first frequency range is 20 Mhz width, and the second frequency range is 20 Mhz width.
[C9] A method for receiving wireless data by a wireless device from a wireless network, the method comprising:
Receiving, by the wireless device, a wireless frame including a preamble and a data portion, wherein the preamble includes a first transmission control information in a first frequency range and a second transmission control information in a second frequency range. The wireless device comprising control information, wherein the data portion encodes first data in a third frequency range and second data in a fourth frequency range. Decoding the first transmission control information to determine if it is identified by:
Decoding the first data in response to the decoded first transmission control information identifying the wireless device;
A method comprising:
[C10] decoding the second transmission control information in response to the first transmission control information not identifying the wireless device;
Decoding the second data in response to the second transmission control information identifying the wireless device;
The method of C9, further comprising:
[C11] determining a frequency range for encoding data addressed to the wireless device in the data portion based on the decoding of the first transmission control information;
Decoding the first data in response to the third frequency range determining to encode data destined for the wireless device;
The method of C9, further comprising:
[C12] The first transmission control information is received within the first frequency range, the second transmission control information is received within the second frequency range, and both are encoded in a HE-SIGB field. C9. The method of C9.
[C13] The method of C9, further comprising parsing the second transmission control information based on an identifier of the wireless device to identify transmission control information specific to the wireless device.
[C14] The method of C9, further comprising decoding the first transmission control information using a 4x tone plan.
[C15] An apparatus for transmitting a wireless frame over a wireless network, comprising: an electronic hardware processor;
An electronic hardware memory operatively connected to the electronic hardware processor;
Wherein the electronic hardware memory, when executed, to the electronic hardware processor,
Generating first transmission control information for a first device;
Generating second transmission control information for a second device;
Transmitting the wireless frame;
Storing the instructions, wherein the transmitting comprises:
Transmitting at least a portion of the first transmission control information in a first frequency range and transmitting at least a portion of the second transmission control information in a second frequency range that does not overlap with the first frequency range; To do
Transmitting first data to the first device according to the first transmission control information;
Transmitting second data to the second device according to the second transmission control information;
An apparatus comprising:
[C16] The electronic hardware memory, when executed, causes the electronic hardware processor to:
Generating the first transmission control information to indicate a data transmission frequency range for the first device that is different from the first frequency range;
Transmitting the first data to the first device on the indicated data transmission frequency;
The apparatus of C15, storing further instructions to cause
[C17] The electronic hardware memory, when executed, further causes the electronic hardware processor to generate the wireless frame to perform a multi-user communication using orthogonal frequency division multiple access (OFDMA). The device according to C15, which stores:
[C18] The electronic hardware memory, when executed, causes the electronic hardware processor to:
Storing further instructions for generating common transmission control information for the first device and the second device, wherein transmitting the wireless frame comprises:
Simultaneously transmitting the common transmission control information in both the first frequency range and the second frequency range;
Transmitting the first data and the second data according to the common transmission control information;
The device of C15, further comprising:
[C19] The electronic hardware memory, when executed, further causes the electronic hardware processor to generate the first transmission control information to define transmission parameters for a third wireless device. The device according to C15, which stores:
[C20] The electronic hardware memory, when executed, transmits to the electronic hardware processor a second wireless frame indicating that the first transmission control information is transmitted in the first frequency range. The apparatus of C15, storing further instructions to cause the first device to transmit.
[C21] The electronic hardware memory, when executed, causes the electronic hardware processor to:
Generating the first transmission control information in a HE-SIGB field of a preamble of the wireless frame;
Generating the second transmission control information during the HE-SIGB field of the preamble of the wireless frame;
Storing the first transmission control information in the first frequency range and the second transmission control information in the second frequency range. The apparatus of C15, comprising transmitting the HE-SIGB field to include:
[C22] The apparatus according to C21, wherein the first frequency range is 20 Mhz width, and the second frequency range is 20 Mhz width.
[C23] An apparatus for receiving wireless data by a wireless device from a wireless network, the apparatus comprising:
A receiver configured to receive a wireless frame including a preamble and a data portion, the preamble comprising: first transmission control information in a first frequency range; and a second transmission control information in a second frequency range. Comprising control information, wherein the data portion encodes first data in a third frequency range and second data in a fourth frequency range;
Decoding the first transmission control information to determine whether the device is identified by the first transmission control information;
Decoding the first data in response to the decoded first transmission control information identifying the device;
A processor configured to perform
An apparatus comprising:
[C24] The processor includes:
Decoding the second transmission control information in response to the first transmission control information not identifying the wireless device;
Decoding the second data in response to the second transmission control information identifying the wireless device;
The device according to C23, further configured to:
[C25] The processor includes:
Determining a frequency range for encoding data in the data portion destined for the wireless device based on the decoding of the first transmission control information;
Decoding the first data in response to the third frequency range determining to encode data destined for the wireless device;
The device according to C23, further configured to:
[C26] The first transmission control information is received within the first frequency range, the second transmission control information is received within the second frequency range, and both are encoded in the HE-SIGB field. The device according to C23, wherein the device is
[C27] The method of C23, wherein the processor is further configured to parse the second transmission control information based on an identifier of the wireless device to identify transmission control information specific to the wireless device. Equipment.
[C28] The apparatus of C23, wherein the processor is further configured to decode the first transmission control information using a 4x tone plan.

Claims (16)

A method of transmitting a wireless frame over a wireless network, comprising:
Generating first transmission control information for a first device during a HE-SIGB field of a preamble of the wireless frame, wherein the first transmission control information indicates a first data transmission frequency range;
Generating second transmission control information for a second device during the HE-SIGB field, wherein the second transmission control information indicates a second data transmission frequency range;
Transmitting the wireless frame;
Wherein said transmitting comprises:
Transmitting at least a portion of the first transmission control information in a first frequency range and transmitting at least a portion of the second transmission control information in a second frequency range that does not overlap with the first frequency range; To do
According to the first transmission control information, transmitting first data to the first device in the first data transmission frequency range, wherein the first data transmission frequency range is the first frequency range. Unlike,
Transmitting second data to the second device in the second data transmission frequency range according to the second transmission control information;
Signaling an indication of the first frequency range including the first transmission control information for the first device to the first device;
A method comprising:   The method of claim 1, further comprising generating the wireless frame to perform multi-user communication using orthogonal frequency division multiple access (OFDMA). Generating common transmission control information for the first device and the second device, wherein transmitting the wireless frame comprises:
Simultaneously transmitting the common transmission control information in both the first frequency range and the second frequency range;
Transmitting the first data and the second data according to the common transmission control information;
The method of claim 1, further comprising:   The method of claim 1, further comprising generating the first transmission control information to define transmission parameters for a third wireless device.   The method of claim 1, further comprising transmitting a second wireless frame to the first device indicating that the first transmission control information is transmitted in the first frequency range.   The method of claim 1, wherein the first frequency range is 20 Mhz wide and the second frequency range is 20 Mhz wide. A method for receiving wireless data by a wireless device from a wireless network, comprising:
Receiving, by the wireless device, a wireless frame including a preamble and a data portion, wherein the preamble includes a first transmission control information in a first frequency range and a second transmission control information in a second frequency range. Comprising control information, wherein the data portion encodes first data within a third frequency range and second data within a fourth frequency range.
Determining whether the wireless device is identified by the first transmission control information based on the indication of the first frequency range including the first transmission control information for the wireless device; Decoding the first transmission control information;
Decoding the first data in response to the decoded first transmission control information identifying the wireless device;
With
Wherein both of said first transmission control information and the second transmission control information is encoded in the HE-SIGB field method. An apparatus for transmitting a wireless frame over a wireless network, the apparatus comprising:
An electronic hardware processor,
An electronic hardware memory operatively connected to the electronic hardware processor;
Wherein the electronic hardware memory, when executed, to the electronic hardware processor,
Generating first transmission control information for a first device during a HE-SIGB field of a preamble of the wireless frame, wherein the first transmission control information indicates a first data transmission frequency range;
Generating second transmission control information for a second device during the HE-SIGB field, wherein the second transmission control information indicates a second data transmission frequency range;
Transmitting the wireless frame;
Storing the instructions, wherein the transmitting comprises:
Transmitting at least a portion of the first transmission control information in a first frequency range and transmitting at least a portion of the second transmission control information in a second frequency range that does not overlap with the first frequency range; To do
According to the first transmission control information, transmitting first data to the first device in the first data transmission frequency range, wherein the first data transmission frequency range is the first frequency range. Unlike,
Transmitting second data to the second device in the second data transmission frequency range according to the second transmission control information;
Signaling an indication of the first frequency range including the first transmission control information for the first device to the first device;
An apparatus comprising:   The electronic hardware memory stores, when executed, further instructions that cause the electronic hardware processor to generate the wireless frame to perform a multi-user communication using orthogonal frequency division multiple access (OFDMA). An apparatus according to claim 8. The electronic hardware memory, when executed, to the electronic hardware processor,
Storing further instructions for generating common transmission control information for the first device and the second device, wherein transmitting the wireless frame comprises:
Simultaneously transmitting the common transmission control information in both the first frequency range and the second frequency range;
Transmitting the first data and the second data according to the common transmission control information;
The apparatus of claim 8, further comprising:   The electronic hardware memory stores, when executed, further instructions that cause the electronic hardware processor to generate the first transmission control information to define transmission parameters for a third wireless device. An apparatus according to claim 8.   The electronic hardware memory, when executed, sends to the electronic hardware processor a second wireless frame indicating that the first transmission control information is transmitted in the first frequency range, to the first hardware frame. 9. The apparatus according to claim 8, storing further instructions for causing the device to transmit.   9. The apparatus of claim 8, wherein said first frequency range is 20 Mhz wide and said second frequency range is 20 Mhz wide. An apparatus for receiving wireless data by a wireless device from a wireless network, the apparatus comprising:
A receiver configured to receive a wireless frame including a preamble and a data portion, wherein the preamble includes first transmission control information in a first frequency range and a second transmission control information in a second frequency range. Comprising transmission control information, wherein said data portion encodes first data within a third frequency range and second data within a fourth frequency range;
Determining whether the device is identified by the first transmission control information based on the indication of the first frequency range including the first transmission control information for the device; Decoding the transmission control information of
Decoding the first data in response to the decoded first transmission control information identifying the device;
A processor configured to perform
With
Wherein both of said first transmission control information and the second transmission control information is encoded in the HE-SIGB field device. A computer program comprising instructions for performing the method according to any one of claims 1 to 6 when executed on a computer.   A computer program comprising instructions for performing the method of claim 7 when executed on a computer.

Images